How hard is the emergency management certification exam really?

So I've been working for my county's office of emergency management for about two years now and my supervisor keeps pushing me to get certified. I finally signed up but honestly I'm kind of freaking out about the exam. I don't have an emergency management degree — I came from a fire department background — so I feel like I'm missing some of the foundational theory stuff everyone else seems to already know.

I've been drilling practice tests like crazy, especially on the logistics side. Found these really helpful: Emergency Management Resource Management and Logistics practice sets that cover the resource typing and mutual aid concepts I kept blanking on. Still struggling though with the federal emergency management agency organizational structure and how FEMA coordinates with state agencies. Like, I understand it conceptually but the exam questions seem to want very specific procedural answers.

Anyone else come from a non-traditional background and still pass? How many hours did you realistically study and what score are you aiming for? Would love to hear from people who've actually sat for it.